[vector] Correct typos in doc of full service ops

[Chris Hegarty]

> On 13 Jul 2020, at 22:54, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> 
> Hi,
> 
> Please review the following that corrects typos in doc of full service ops:
> 
>  http://cr.openjdk.java.net/~psandoz/panama/vector-type-full-service-op-doc/webrev/ 

LGTM.

-Chris.